Problem to be solved: to provide a reforming system capable of improving the mounting property.The reforming device 2 isA housing 5 having an inlet part 8 into which ammonia gas and air are introducedDisposed within the housingLow temperature working catalyst 11 for reforming ammonia gasIt is arranged on the lead out side 10 side from the low-temperature operation catalyst 11 in the housingA high-temperature working catalyst 12 for reforming ammonia gas at a higher temperature than the low temperature working catalyst 11 andA movable guide 17 for switching the flow of ammonia gas and air introduced into the housing 5The movable guide 17 has a drive portion for moving the movable guide 17 in the axial direction of the housingLow temperature working catalystA detour passage s is formed so as to interfere with the low-temperature operation catalyst 11 to communicate the introduction part 8 with the high-temperature working catalyst 12.ControllerThe movable guide 17 is moved between the start position for interrupting the introduction part 8 and the detour passage s and a stationary position for communicating the introduction part 8 and the detour channel s with the stationary positionThe drive section is controlled.Diagram
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